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 5.2.1 Cost Considerations. When deciding to meter, he following items are
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some of the cost considerate.c]ns which must; must be addressed:
q What
fluid(s) are to be metered?
q What
information is required?
What type meter will best provide the information?
q
q What
is the initial cost of each meter?
q What
type of installation-permanent or temporary?
q What
special equipment is required for installation?
q Will
shutdown of the system be necessary for installation?
q What
ancillary or transmission equipment is required?
How often and to what extent is maintenance required?
q
q How
much energy loss accrues from metering?
q What
are personnel and training requirements?
6. OTHER ENERGY MANAGEMENT. High-tmperature water, natural gas, potable?
water, and wastewater represent systems that cost less than either electricity
or steam; however,costs are not insignificant. etering programs should be
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initiated to determine how effectively these systems are being used and what
savings can be obtained.
6.1 High-Temperature Water. ot water is frequently employed in applications
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closely related to steam.Meters may introduce problems in a hot water system
that do not apply to a steam system, en though many meters can be used in
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either system. For example, meter induced pressure drops in a
high-temperature water system can be critical if not accounted for in the
original design. Should orifice meters be retrofitted in a system that was
not initially designed for them, is possible that the difference between
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the working pressure and saturation pressure of the fluid, sometimes called
the antiflash margin, could disappear.hould the water flash to steam,
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results could be catastrophic, herefore, it may be necessary to employ only
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meters that operate with very low or zero pressure drop.
6.2 Natural Gas. Since natural gas is often used for- heating purposes,
individual. meters may result in proportional. savings as is the case with
electrical energy when flat rates are terminated in favor of individual
meters , Thermostats normally are installed in conjunction with a natural gas
heating system.
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